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Contract n° BOS-038-F

The wood behaviour during mechanical defibring

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Pulp, Paper and Board
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Summary

The study include two parts: “Behaviour of wood in a chip destructuration press” and “The rheological characteristics of wood”. In the first part we study the effects of destructuration on the morphology of fibres. Fibres of softwood and ring porous hardwood, the structure of which is heterogeneous, can be the object of an alteration; on the contrary hardwood with a homogeneous structure can be submitted to a thorough destructuration without damage in the fine structure of the fibres. In the second part we study the conservation modulus and loss modulus of a softwood and a hardwood at different temperatures and dryness and different frequencies. The increasing of the conservation modulus with frequency can explain the energy saving with defibring equipments which apply on wood low speed stress.

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Bibliography of the First Part

  1. Charuel R., Coste G., Renaud M., Rosselet J.C., Serra-Tosio J.M. Rapport général des études sur les transferts de chaleur dans les procédés de mise en pâte; Document Ecole Française de Papeterie (1970).

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  2. Haggerty P.; Coefficients de transfert de chaleur à travers un lit fixe de copeaux de bois; Document Ecole Française de Papeterie (1980).

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  3. Portugal S.; Détermination des coefficients de transfert de chaleur par analyse thermique dans un lit fixe de copeaux de bois Thesis of “Doctorat de 3ème cycle”, INPG, Grenoble (1984).

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  4. Anonymous; Revue ATIP (1983), vol. 37, n° 2, p. 60.

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  5. Pech D.; Etude de la perméabilité de lits compressibles constitués de copeaux de bois partiellement destructurés. Thesis of “Doctorat de 3ème cycle”, INPG, Grenoble (1984).

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Bibliography of the Second Part

  • L. Salmen; Temperature and water induced softening behaviour of wood fibre based materials; Thesis presented before the Royal Institute of Technology, February 26 (1982), Stockholm.

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  • Lieder, Nissan; Understanding the disk refiners: the mechanical treatment of the fiber; TAPPI, vol. 60, n° 10, p. 85–89 (1977).

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  • G. Baudin, R. Charuel, J. Silvy; Comportement du bois soumis à un effort de cisaillement; Actes du Colloque “Sciences et Industries du Bois”, Grenoble, 20–22 septembre 1982, Ministère de la Recherche et de la Technologie.

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  • J. Pouyet, J.L. Lataillade, C. Signoret; Recherche de modèles rhéologiques pour les polymères solides sollicités à grande vitesse de déformation. Problèmes d’identification; Cahiers du Groupe Français de Rhéologie, vol. 5, n° 6, p. 293–304 (1982).

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© 1987 ECSC, EEC, EAEC, Brussels and Luxembourg

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Charuel, R., Rueff, M. (1987). Contract n° BOS-038-F. In: Hendry, I.F., Hanssens, W.J.H. (eds) Pulp, Paper and Board. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-1345-5_3

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  • DOI: https://doi.org/10.1007/978-94-009-1345-5_3

  • Publisher Name: Springer, Dordrecht

  • Print ISBN: 978-94-010-7098-0

  • Online ISBN: 978-94-009-1345-5

  • eBook Packages: Springer Book Archive

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